Gas detection & measurement


of the Yokogawa AQ6300 series of OSAs. The world’s first OSA offering side mode analysis of MWIR lasers, it offers extended wavelength coverage into the MWIR region from 1.9 to 5.5m. Its long wavelength range makes the AQ6377 ideal for environmental sensing and medical applications. The device also achieves wavelength measurement accuracy of ±0.5nm and provides a close-in dynamic range of 50dB, thanks to the sharp spectral characteristics of the AQ6377’s monochromator. This means that signals in close proximity can be clearly separated and accurately measured.


According to Mr Wang, CEO of MicroPhotons, the AQ6377 OSA has provided outstandingly accurate measurement of the emissions of both tunable lasers and the super-continuum light source. This accuracy was proved by a measurement exercise performed after characterisation of the super-continuum light source using the AQ6377. Mr Wang says that MicroPhotons ran measurements of the absorption of emissions from the characterised super- continuum light source.


He says: “We measured the absorption


spectra of a range of gases including C2H2, C2H6, C3H8, and NH3. “The measurement results very closely


tracked the data provided by the SpectraPlot online tool, which provides a reference for the optical characteristics of gases. This gave us great confidence that the measurement output from the AQ6377, on the basis of which we characterised the light source, is extremely accurate and repeatable over its very broad measurement bandwidth.”


Yokogawa Test & Measurement tmi.yokogawa.com


Instrumentation Monthly June 2024


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